What Is The Difference Between Silicon And Germanium?

What is difference between silicon and germanium diode?

A Silicon Diode is a semiconductor that has both positive and negative charge polarity and can allow an electrical current to flow in one direction whilst restricting another.

Silicon Diodes have a forward voltage of approximately 0.7 volts whereas Germanium Diodes have a forward voltage of approximately 0.3 volts..

Why germanium is not used in SCR?

Ability to withstand at high temperature: silicon crystals have capability to withstand at higher temperature compare to germanium crystals . So if leakage current is produced in SCR it heats up the device then silicon crystals can withstand but not germanium crystals.

Is germanium harmful to humans?

Germanium is LIKELY UNSAFE when taken by mouth in elemental form and in the form of certain compounds such as germanium oxide. There have been more than 30 reports of kidney failure and death linked with use of these forms of germanium. It builds up in the body and can damage vital organs such as the kidneys.

Which is better silicon or germanium?

The structure of Germanium crystals will be destroyed at higher temperature. However, Silicon crystals are not easily damaged by excess heat. Peak Inverse Voltage ratings of Silicon diodes are greater than Germanium diodes. Si is less expensive due to the greater abundance of element.

Is germanium a silicon?

It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin. Pure germanium is a semiconductor with an appearance similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature.

Why germanium is not used in solar cells?

Germanium is never used by itself as a solar cell because the efficiency is much lower than silicon, a cheaper alternative. … The room temperature band gaps of germanium, silicon and gallium arsenide are superimposed. Both Si and GaAs make good single junction cells but silicon is far cheaper than GaAs.

How leakage current is produced?

The leakage current in equipment flows when an unintentional electrical connection occurs between the ground and an energized part or conductor. … These results into small current leaking or flowing through the through the dielectric, in the case of a capacitor.

What makes silicon so special?

Silicon has the relatively unique property for an element in that it expands when it freezes like water. It has a high melting point of 1,400 degrees Celsius and boils at 2,800 degrees Celsius. The most abundant compound in the Earth’s crust is silicon dioxide.

Why Germanium is a semiconductor?

Germanium atoms have one more shell than silicon atoms, but what makes for the interesting semiconductor properties is the fact that both have four electrons in the valence shell. As a consequence, both materials readily constitute themselves as crystal lattices. Substituted atoms alter the electrical properties.

Why band gap of silicon is more than germanium?

The silicon atom electrons are more tightly bound to the nucleus than the germanium atom electrons due to its small size. So energy gap is more in that case.

Where is germanium found?

Germanium is primarily mined with zinc ore as well as with argyrodite, germanite, and coal according to the Los Alamos National Laboratory. According to Chemistry Explained, germanium is mined in Alaska, Tennessee, China, the United Kingdom, Ukraine, Russia and Belgium.

What is the use of silicon and germanium?

Silicon-germanium is an important material that is used for the fabrication of SiGe heterojunction bipolar transistors and strained Si metal-oxide-semiconductor (MOS ) transistors for advanced complementary metal-oxide-semiconductor (CMOS ) and BiCMOS (bipolar CMOS) technologies.

Why are silicon and germanium the most frequently used?

Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity. Silicon is by far the more widely used semiconductor for electronics, partly because it can be used at much higher temperatures than germanium.

Why is Germanium important?

Many other substances now also are used as semiconductors, but germanium remains of primary importance in the manufacture of transistors and of components for devices such as rectifiers and photocells. Germanium. Properties of germanium.

What is the zener breakdown voltage?

The Zener Breakdown is observed in the Zener diodes having Vz less than 5V or between 5 to 8 volts. When a reverse voltage is applied to a Zener diode, it causes a very intense electric field to appear across a narrow depletion region.

What are uses of germanium?

The largest use of germanium is in the semiconductor industry. When doped with small amounts of arsenic, gallium, indium, antimony or phosphorus, germanium is used to make transistors for use in electronic devices. Germanium is also used to create alloys and as a phosphor in fluorescent lamps.

What is a germanium fuzz?

Germanium Warfare Fans of the earliest vintage fuzz pedals swear by the sonic properties of germanium transistors, which tend to be a little softer sounding and more compressed than the silicon transistors that proliferated by the late ’60s.

Why leakage current is more for germanium diode?

In Germanium and Silicon diodes, leakage current is only of few microamperes and nanoamperes, respectively. Germanium is much more susceptible to temperature than silicon. For this reason, mostly Silicon is used in modern semiconductor devices.